]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - drivers/usb/host/ehci-fsl.c
Merge branch 'u-boot/master' into u-boot-arm/master
[karo-tx-uboot.git] / drivers / usb / host / ehci-fsl.c
1 /*
2  * (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
3  *
4  * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
5  *
6  * Author: Tor Krill tor@excito.com
7  *
8  * SPDX-License-Identifier:     GPL-2.0+
9  */
10
11 #include <common.h>
12 #include <pci.h>
13 #include <usb.h>
14 #include <asm/io.h>
15 #include <usb/ehci-fsl.h>
16 #include <hwconfig.h>
17
18 #include "ehci.h"
19
20 /* Check USB PHY clock valid */
21 static int usb_phy_clk_valid(struct usb_ehci *ehci)
22 {
23         if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
24                         in_be32(&ehci->prictrl))) {
25                 printf("USB PHY clock invalid!\n");
26                 return 0;
27         } else {
28                 return 1;
29         }
30 }
31
32 /*
33  * Create the appropriate control structures to manage
34  * a new EHCI host controller.
35  *
36  * Excerpts from linux ehci fsl driver.
37  */
38 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
39 {
40         struct usb_ehci *ehci;
41         const char *phy_type = NULL;
42         size_t len;
43 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
44         char usb_phy[5];
45
46         usb_phy[0] = '\0';
47 #endif
48
49         ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB_ADDR;
50         *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
51         *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
52                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
53
54         /* Set to Host mode */
55         setbits_le32(&ehci->usbmode, CM_HOST);
56
57         out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
58         out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);
59
60         /* Init phy */
61         if (hwconfig_sub("usb1", "phy_type"))
62                 phy_type = hwconfig_subarg("usb1", "phy_type", &len);
63         else
64                 phy_type = getenv("usb_phy_type");
65
66         if (!phy_type) {
67 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
68                 /* if none specified assume internal UTMI */
69                 strcpy(usb_phy, "utmi");
70                 phy_type = usb_phy;
71 #else
72                 printf("WARNING: USB phy type not defined !!\n");
73                 return -1;
74 #endif
75         }
76
77         if (!strcmp(phy_type, "utmi")) {
78 #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
79                 setbits_be32(&ehci->control, PHY_CLK_SEL_UTMI);
80                 setbits_be32(&ehci->control, UTMI_PHY_EN);
81                 udelay(1000); /* delay required for PHY Clk to appear */
82 #endif
83                 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
84                 setbits_be32(&ehci->control, USB_EN);
85         } else {
86                 setbits_be32(&ehci->control, PHY_CLK_SEL_ULPI);
87                 clrsetbits_be32(&ehci->control, UTMI_PHY_EN, USB_EN);
88                 udelay(1000); /* delay required for PHY Clk to appear */
89                 if (!usb_phy_clk_valid(ehci))
90                         return -EINVAL;
91                 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
92         }
93
94         out_be32(&ehci->prictrl, 0x0000000c);
95         out_be32(&ehci->age_cnt_limit, 0x00000040);
96         out_be32(&ehci->sictrl, 0x00000001);
97
98         in_le32(&ehci->usbmode);
99
100         return 0;
101 }
102
103 /*
104  * Destroy the appropriate control structures corresponding
105  * the the EHCI host controller.
106  */
107 int ehci_hcd_stop(int index)
108 {
109         return 0;
110 }